Note : Les descriptions sont présentées dans la langue officielle dans laquelle elles ont été soumises.
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THERMOPLASTIC COMPOSITION
TECHNICAL FIELD
[0001] The invention relates to a composition containing a particulate
solid, a plastic
material (such as a thermoplastic polymer) and a polymer. The polymer may be
capable of
being a dispersant.
BACKGROUND
[0002] Thermoplastics such as polypropylene, polyethylene, etc., are
typically colored
using pigment concentrates. The pigment concentrates may be referred to as
masterbatches.
These concentrates are prepared by mixing ingredients together and subjecting
them to any of
the processes commonly used for dispersing particulate solids in a plastic
material, such as a
thermoplastic polymer. Compounding or mixing in a twin-screw extruder is one
such process.
Masterbatches may contain up to 70% of pigment, and optionally other
additives. Other
additives may include waxes, dispersants, lubricants and/or UV stabilizers.
[0003] Production of masterbatches typically utilizes a pigment dispersed
in a plastic
material, such as a thermoplastic polymer, to ideally form fine particles with
limited amounts
of aggregates. However, aggregates are known to form from the pigments in the
production of
masterbatches. The presence of pigment aggregates may result in filter
blocking of the extruder.
[0004] In addition, particular requirements are important for finished
articles containing a
thermoplastic polymer. The thermoplastic polymer may be in the form of, for
example, a solid
article, a film, or a fiber. In solid articles, acceptable dispersion of the
pigment is necessary in
order to maximize color development, maximize tinctorial strength and/or
reduce speck levels.
For films, incomplete dispersion of the pigment may lead to cracking, unwanted
light scattering
effects, and/or specks. In fibers, incomplete dispersion of the pigment may
result in fiber
breakage.
[0005] Previous work has been conducted to provide dispersants for
pigments used in
plastic materials, such as thermoplastic polymers. Conventional dispersants
are becoming, or
may become, undesirable, such as because of increased regulatory scrutiny of
non-polymeric
dispersants.
[0006] The disclosed technology, therefore, provides compositions which are
able to reduce
or minimize at least one of any of the technical challenges discussed above.
These challenges
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may lead to less efficient processing in expensive extruder-type equipment,
causing production
costs to increase. The present subject matter therefore identifies polymers,
and compositions
including the polymers, wherein the polymers are capable of dispersing a
pigment allowing a
thermoplastic to have at least one of: (i) a reduction in aggregates and/or
specks; (ii) a finer
state of dispersion (for example, having a lower filter pressure value); (iii)
acceptable/improved
tinctorial strength and/or improved brightness; (iv) faster rates of
dispersion; or (v) a polymeric
dispersant.
SUMMARY
[0007] The subject matter disclosed herein provides compositions
comprising a
particulate solid, a plastic material and a polymer, wherein the polymer is a
polyamide
with fatty terminal end groups; wherein the polyamide is a condensation
reaction product
of a diamine and a diacid; wherein the polymer has from 5 to 13 monomer units;
wherein
the diamine is a saturated C2-C12, linear, branched, or cyclic diamine;
wherein the amine
groups of the diamine are primary or secondary; wherein the diacid is a
saturated C20-050
branched carboxylic diacid; and wherein each of the fatty terminal end groups
are
independently a C6-C36 linear or branched carbon chain which is attached to
the polyamide
via an amide or an imide bond.
[0008] Also provided are uses of a polymer as a dispersant in a
composition further
comprising a particulate solid and a plastic material, wherein the polymer is
a polyamide
with fatty terminal end groups; wherein the polyamide is a condensation
reaction product
of a diamine and a diacid; wherein the polymer has from 5 to 13 monomer units;
wherein
the diamine is a saturated C2-C12, linear, branched, or cyclic diamine;
wherein the amine
groups of the diamine are primary or secondary; wherein the diacid is a
saturated C20-050
branched carboxylic diacid; and wherein each of the fatty terminal end groups
are
independently a C6-C36 linear or branched carbon chain which is attached to
the polyamide
via an amide or an imide bond.
[0009] Further provided are methods of using a polymer as a dispersant
in a
composition, comprising providing the polymer to the composition; wherein the
composition comprises a particulate solid and a plastic material; wherein the
polymer is a
polyamide with fatty terminal end groups; wherein the polyamide is a
condensation
reaction product of a diamine and a diacid; wherein the polymer has from 5 to
13 monomer
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units; wherein the diamine is a saturated C2-C12, linear, branched, or cyclic
diamine;
wherein the amine groups of the diamine are primary or secondary; wherein the
diacid is
a saturated C20-050 branched carboxylic diacid; and wherein each of the fatty
terminal end
groups are independently a C6-C36 linear or branched carbon chain which is
attached to
the polyamide via an amide or an imide bond.
[0010] The following embodiments of the present subject matter are
contemplated:
[0011] 1. A composition comprising a particulate solid, a plastic
material and a
polymer, wherein the polymer is a polyamide with fatty terminal end groups;
wherein the
polyamide is a condensation reaction product of a diamine and a diacid;
wherein the
polymer has from 5 to 13 monomer units; wherein the diamine is a saturated C2-
C12, linear,
branched, or cyclic diamine; wherein the amine groups of the diamine are
primary or
secondary; wherein the diacid is a saturated C20-050 branched carboxylic
diacid; and
wherein each of the fatty terminal end groups are independently a C6-C36
linear or
branched carbon chain which is attached to the polyamide via an amide or an
imide bond.
[0012] 2. The composition of embodiment 1, wherein the polymer has a
theoretical
molecular weight of from 1,000 to 5,000 g/mol.
[0013] 3. The composition of either of embodiment 1 or embodiment 2,
wherein the
polymer has from 5 to 7 monomer units.
[0014] 4. The composition of any one of embodiments 1 to 3, wherein the
diamine is
a saturated C4-C12 linear, branched, or cyclic diamine.
[0015] 5. The composition of any one of embodiments 1 to 4, wherein the
plastic material
is a thermoplastic polymer.
[0016] 6. The composition of any one of embodiments 1 to 5, wherein the
plastic material
is a thermoset resin or a thermoplastic resin.
[0017] 7. The composition of any one of embodiments 1 to 6, wherein the
particulate solid
is a pigment.
[0018] 8. The composition of any one of embodiments 1 to 7, wherein the
particulate solid
is present in the composition in an amount of 1 wt. % to 95 wt. %, based on
the total weight of
the composition.
[0019] 9. The composition of any one of embodiments 1 to 8, wherein the
polymer is
present in an amount of 0.1 wt. % to 50 wt. %, based on the total weight of
the composition.
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[0020] 10. The composition of any one of embodiments 1 to 9, wherein:
(a) the polymer is
present in an amount of 0.1 wt. % to 50 wt. %, based on the total weight of
the composition;
and (b) the plastic material comprises at least one of: (i) an amorphous poly-
a-olefin, present
in an amount of up to 90 wt. %, based on the total weight of the composition;
(ii) a wax, present
in an amount of up to 90 wt. %, based on the total weight of the composition;
(iii) a crystalline
polyolefin, present in an amount of up to 30 wt. %, based on the total weight
of the composition;
or (iv) a hydrogenated castor oil wax, present in an amount of up to 75 wt. %,
based on the total
weight of the composition; with the proviso that at least one of (i) or (ii)
is present in an amount
of at least 0.1 wt. %, based on the total weight of the composition.
[0021] 11. The composition of embodiment 10, wherein the amorphous poly-a-
olefin is a
polyethylene/polypropylene mixture.
[0022] 12. The composition of any one of embodiments 1 to 11, wherein
at least 10 wt. %
of the composition, based on the total weight of the composition, has a
particle size fraction of
1 mm or less.
[0023] 13. The composition of any one of embodiments 1 to 12, wherein at
least 10 wt. %
of the composition, based on the total weight of the composition, has a
particle size fraction of
from 50 nm to 1 mm.
[0024] 14. The composition of any one of embodiments 1 to 13, wherein
the polymer has
an acid value of less than 10 mg KOH/g.
[0025] 15. The composition of any one of embodiments 1 to 14, wherein the
polymer has
an amine value of less than 10 mg KOH/g.
[0026] 16. Use of a polymer as a dispersant in a composition further
comprising a
particulate solid and a plastic material, wherein the polymer is a polyamide
with fatty
terminal end groups; wherein the polyamide is a condensation reaction product
of a
diamine and a diacid; wherein the polymer has from 5 to 13 monomer units;
wherein the
diamine is a saturated C2-C12, linear, branched, or cyclic diamine; wherein
the amine
groups of the diamine are primary or secondary; wherein the diacid is a
saturated C20-050
branched carboxylic diacid; and wherein each of the fatty terminal end groups
are
independently a C6-C36 linear or branched carbon chain which is attached to
the polyamide
via an amide or an imide bond.
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[0027] 17. A method of using a polymer as a dispersant in a
composition, comprising
providing the polymer to the composition; wherein the composition comprises a
particulate solid and a plastic material; wherein the polymer is a polyamide
with fatty
terminal end groups; wherein the polyamide is a condensation reaction product
of a
diamine and a diacid; wherein the polymer has from 5 to 13 monomer units;
wherein the
diamine is a saturated C2-C12, linear, branched, or cyclic diamine; wherein
the amine
groups of the diamine are primary or secondary; wherein the diacid is a
saturated C20-050
branched carboxylic diacid; and wherein each of the fatty terminal end groups
are
independently a C6-C36 linear or branched carbon chain which is attached to
the polyamide
via an amide or an imide bond.
[0028] 18. The method of embodiment 17, wherein the polymer has a
theoretical
molecular weight of from 1,000 to 5,000 g/mol.
[0029] 19. The method of either of embodiment 17 or embodiment 18,
wherein the
polymer has from 5 to 7 monomer units.
[0030] 20. The method of any one of embodiments 17 to 19, wherein the
diamine is a
saturated C4-C12 linear, branched, or cyclic diamine.
DETAILED DESCRIPTION
[0031] Various features and embodiments of the present subject matter
will be described
below by way of non-limiting illustration.
[0032] The amount of each chemical component described herein is presented
exclusive of
any solvent or diluent oil, which may be customarily present in the commercial
material, that
is, on an active chemical basis, unless otherwise indicated. However, unless
otherwise
indicated, each chemical or composition referred to herein should be
interpreted as being a
commercial grade material which may contain the isomers, by-products,
derivatives, and other
such materials which are normally understood to be present in the commercial
grade.
[0033] It is known that some of the materials described herein may
interact in the final
formulation, so that the components of the final formulation may be different
from those that
are initially added. For instance, metal ions (of, e.g., a detergent) may
migrate to other acidic
or anionic sites of other molecules. The products formed thereby, including
the products
formed upon employing the composition of the present subject matter in its
intended use, may
not be susceptible of easy description. Nevertheless, all such modifications
and reaction
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products are included within the scope of the present subject matter; the
present subject matter
encompasses the composition prepared by admixing the components described
herein.
[0034] As used herein, the indefinite article "a" is intended to mean
one or more than one.
As used herein, the phrase "at least one" means one or more than one of the
following terms.
Thus, "a" and "at least one" may be used interchangeably. For example "at
least one of A, B
or C" means that just one of A, B or C may be included, and any mixture of two
or more of A,
B and C may be included, in alternative embodiments.
[0035] As used herein, the term "about" means that a value of a given
quantity is within
20% of the stated value. In other embodiments, the value is within 15% of the
stated
value. In other embodiments, the value is within 10% of the stated value. In
other
embodiments, the value is within 5% of the stated value. In other
embodiments, the value is
within 2.5% of the stated value. In other embodiments, the value is within
1% of the stated
value. In other embodiments, the value is within a range of the explicitly-
described value which
would be understood by those of ordinary skill, based on the disclosures
provided herein, to
perform substantially similarly to compositions including the literal amounts
described herein.
[0036] As used herein, the term "substantially" means that a value of a
given quantity is
within 10% of the stated value. In other embodiments, the value is within 5%
of the stated
value. In other embodiments, the value is within 2.5% of the stated value. In
other
embodiments, the value is within 1% of the stated value.
[0037] As used herein, the term "substantially free of' means that a
component does not
include any intentional addition of the material which the component is
"substantially free of'.
For example, the component may include a material which the component is
"substantially free
of' at no more than impurity levels, which may be the result of incomplete
chemical reactions
and/or unintended/undesired (but perhaps unavoidable) reaction products.
[0038] As used herein, the transitional term "comprising," which is
synonymous with
"including," "containing," or "characterized by," is inclusive or open-ended
and does not
exclude additional, un-recited elements or method steps. However, in each
recitation of
"comprising" herein, it is intended that the term also encompass, as
alternative embodiments,
the phrases "consisting essentially of' and "consisting of," where "consisting
of' excludes any
element or step not specified and "consisting essentially of' permits the
inclusion of additional
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un-recited elements or steps that do not materially affect the essential or
basic and novel charac-
teristics of the composition or method under consideration.
[0039] In certain embodiments, provided are compositions comprising a
particulate
solid, a plastic material and a polymer, wherein the polymer is a polyamide
with fatty
terminal end groups; wherein the polyamide is a condensation reaction product
of a
diamine and a diacid; wherein the polymer has from 5 to 13 monomer units;
wherein the
diamine is a saturated C2-C12, linear, branched, or cyclic diamine; wherein
the amine
groups of the diamine are primary or secondary; wherein the diacid is a
saturated C20-050
branched carboxylic diacid; and wherein each of the fatty terminal end groups
are
independently a C6-C36 linear or branched carbon chain which is attached to
the polyamide
via an amide or an imide bond.
[0040] In certain embodiments, the polymer has from 5 to 13 monomer
units, such as
from 6 to 13 monomer units, such as from 7 to 13 monomer units, such as from 8
to 13
monomer units, such as from 9 to 13 monomer units, such as from 10 to 13
monomer
units, such as from 11 to 13 monomer units, such as from 12 to 13 monomer
units, such
as from 5 to 12 monomer units, such as from 6 to 12 monomer units, such as
from 7 to 12
monomer units, such as from 8 to 12 monomer units, such as from 9 to 12
monomer units,
such as from 10 to 12 monomer units, such as from 11 to 12 monomer units, such
as from
5 to 11 monomer units, such as from 6 to 11 monomer units, such as from 7 to
11 monomer
units, such as from 8 to 11 monomer units, such as from 9 to 11 monomer units,
such as
from 10 to 11 monomer units, such as from 5 to 10 monomer units, such as from
6 to 10
monomer units, such as from 7 to 10 monomer units, such as from 8 to 10
monomer units,
such as from 9 to 10 monomer units, such as from 5 to 9 monomer units, such as
from 6
to 9 monomer units, such as from 7 to 9 monomer units, such as from 8 to 9
monomer
units, such as from 5 to 8 monomer units, such as from 6 to 8 monomer units,
such as
from 7 to 8 monomer units, such as from 5 to 7 monomer units, such as from 6
to 7
monomer units, such as from 5 to 6 monomer units. In certain embodiments, the
polymer
has 5, 6, 7, 8, 9, 10, 11, 12, or 13 monomer units. When referring to the
number of
monomer units in the polymer, what is meant is the number of monomer units
which are
combined together via chemical reaction to form the polymer.
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[0041]
In certain embodiments, the diamine is a saturated C2-C12 (such as C4-C12,
C6-
C12, C8-C12, C10-C12, C2-C10, C4-C10, C6-C10, C8-C10, C2-C8, C4-C8, C6-C8, C2-
C6, C4-C6,
or C2-C4) linear, branched, or cyclic diamine. It is to be understood that the
qualifiers
"linear", "branched", and "cyclic" shall only apply to a particular embodiment
if such an
embodiment is chemically possible, as would be understood by one of ordinary
skill in
the relevant art. For example, it is not be possible for the diamine to be a
saturated C2
cyclic diamine, so such an embodiment should be considered to be excluded from
the
broader embodiments described in this paragraph. Suitable non-limiting
examples of the
diamine include ethylenedi amine, diaminopropane, diaminobutane,
diaminopentane,
hexam ethylenedi amine, diaminooctane,
diaminononane, diaminodecane,
diaminododecane, piperazine, methylpiperazine, dimethylpiperazine,
homopiperazine,
and bis-(aminomethyl)-cyclohexane.
[0042]
In certain embodiments, the diacid is a saturated C20-050 (such as C24-050,
C28-
050, C32-050, C36-050, C40-050, C44-050, C20-C46, C24-C46, C28-C46, C32-C46,
C36-C46, C40-
C46, C20-C42, C24-C42, C28-C42, C32-C42, C36-C42, C20-C38, C24-C38, C28-C38,
C32-C38, C20-
C34, C24-C34, C28-C34, C20-C30, C24-C30, or C20-C26) branched carboxylic
diacid. Suitable
non-limiting examples of commercially-available diacids include the UNIDYMETm
product
range available from Kraton Corporation.
[0043]
In certain embodiments, each of the fatty terminal end groups are
independently
a C6-C36 (such as C10-C36, C14-C36, C18-C36, C22-C36, C26-C36, C30-C36, C6-
C32, C10-C32,
C14-C32, C18-C32, C22-C32, C26-C32, C6-C28, C10-C28, C14-C28, C18-C28, C22-
C28, C6-C24, C10-
C24, C14-C24, C18-C24, C6-C20, C10-C20, C14-C20, C6-C16, C10-C16, or C6-C12)
linear or
branched carbon chain.
[0044]
Suitable compounds which may be used to form the fatty terminal end groups
include, without limitation: fatty acids and/or their methyl/ethyl esters;
fatty amines (such
as hexylamine, octylamine, stearamine, decylamine, and/or nonanamine); and/or
fatty
acid anhydrides (such as dodecyl succinic anhydride, hexadecyl succinic
anhydride,
octadecyl succinic anhydride, dodecenyl succinic anhydride, hexadecenyl
succinic
anhydride, octadecenyl succinic anhydride, and/or PentasizeTM 68 from
Pentagon).
[0045] Suitable examples of fatty acids and/or their methyl/ethyl esters
include,
without limitation, myristic acid, oleic acid, palmitic acid, erucic acid,
behenic acid,
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VersaticTM acid 911 (may also be described as a C9_11-branched fatty acid),
VersaticTM
acid 10 (may also be described as tert-decanoic acid), ricinoleic acid, 12-
hydroxystearic,
9,11-linoleic acid, 9,12-linoleic acid, 9,12,15-linolenic acid, abietic acid,
hexanoic acid,
octanoic acid, lauric acid, decanoic acid, stearic acid, 2-ethylbutyric acid,
2-ethylhexanoic
acid, 2-butyloctanoic acid, 2-hexyldecanoic acid, 2-octyldodecanoic acid, 2-
decyltetradecanoic acid, or mixtures thereof. Branched alkyl carboxylic acids
of this type
are available under the trade mark Isocarbg (from Sasol GmbH) and specific
examples
are Isocarbg 12, 16, 20, 28, 32, 34T and 36. Many of the carboxylic acids are
available
commercially as mixtures. Further examples of fatty acids include the Unicidg
acids
(linear primary synthetic carboxylic acids) commercially available from Baker
Petrolite
Polymer Division.
[0046] Other examples of suitable fatty acids include, without
limitation, mixtures of
fatty acids derived from oils from naturally occurring sources such as
sunflower oil, olive
oil, rapeseed oil, castor oil, palm oil, coconut oil, linseed oil, soya bean
oil, fish oil and
the like, in either a hydrogenated (saturated) or unsaturated form.
[0047] In certain embodiments, the fatty terminal end group may be
selected from one
or more of the types of compounds described above based on the nature of the
polyamide
portion. For example, if a diamine is used in excess, the fatty terminal group
may be
selected from at least one of the fatty acids and/or their methyl/ethyl esters
or the fatty
acid anhydrides; or, if a diacid is used in excess, the fatty terminal group
may be selected
from at least one of the fatty amines.
[0048] In certain embodiments, the polymer has a theoretical molecular
weight of from
1,000 to 5,000 g/mol, such as from 1,500 to 5,000 g/mol, from 2,000 to 5,000
g/mol, from
2,500 to 5,000 g/mol, from 3,000 to 5,000 g/mol, from 3,500 to 5,000 g/mol,
from 4,000
to 5,000 g/mol, from 4,500 to 5,000 g/mol, from 1,000 to 4,500 g/mol, from
1,500 to 4,500
g/mol, from 2,000 to 4,500 g/mol, from 2,500 to 4,500 g/mol, from 3,000 to
4,500 g/mol,
from 3,500 to 4,500 g/mol, from 4,000 to 4,500 g/mol, from 1,000 to 4,000
g/mol, from
1,500 to 4,000 g/mol, from 2,000 to 4,000 g/mol, from 2,500 to 4,000 g/mol,
from 3,000
to 4,000 g/mol, from 3,500 to 4,000 g/mol, from 1,000 to 3,500 g/mol, from
1,500 to 3,500
g/mol, from 2,000 to 3,500 g/mol, from 2,500 to 3,500 g/mol, from 3,000 to
3,500 g/mol,
from 1,000 to 3,000 g/mol, from 1,500 to 3,000 g/mol, from 2,000 to 3,000
g/mol, from
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2,500 to 3,000 g/mol, from 1,000 to 2,500 g/mol, from 1,500 to 2,500 g/mol,
from 2,000
to 2,500 g/mol, from 1,000 to 2,000 g/mol, from 1,500 to 2,000 g/mol, or from
1,000 to
1,500 g/mol. As used herein when referring to the subject polymer, the term
"theoretical
molecular weight" means an average molecular weight of the subject polymer
determined
by (1) calculating the molecular weight of each monomer unit in the polymer
based on the
chemical formula of the monomer unit, (2) adding together the molecular weight
of each
monomer unit in the polymer, and (3) subtracting out any atoms/molecules which
may be
lost (such as water) when the monomer units are reacted together to form the
subject
polymer or precursor(s) thereof.
[0049] In certain embodiments, the plastic material is a thermoplastic
polymer.
[0050] In certain embodiments, the plastic material is a thermoset
resin or a thermoplastic
resin.
[0051] In certain embodiments, the particulate solid is a pigment.
[0052] In certain embodiments, the particulate solid is present in the
composition in an
amount of 1 wt. % to 95 wt. %, based on the total weight of the composition.
[0053] In certain embodiments: (a) the polymer is present in an amount
of 0.1 wt. % to 50
wt. %, based on the total weight of the composition; (b) the plastic material
comprises at least
one of: (i) an amorphous poly-a-olefin, present in an amount of up to 90 wt.
%, based on the
total weight of the composition; (ii) a wax, present in an amount of up to 90
wt. %, based on
the total weight of the composition; (iii) a crystalline polyolefin, present
in an amount of up to
wt. %, based on the total weight of the composition; or (iv) a hydrogenated
castor oil wax,
present in an amount of up to 75 wt. %, based on the total weight of the
composition; with the
proviso that at least one of (i) or (ii) is present in an amount of at least
0.1 wt. %, based on the
total weight of the composition. In certain embodiments, the amorphous poly-a-
olefin is a
25 polyethylene/polypropylene mixture.
[0054] In certain embodiments, at least 10 wt. % of the composition,
based on the total
weight of the composition, has a particle size fraction of 1 mm or less.
[0055] In certain embodiments, at least 10 wt. % of the composition,
based on the total
weight of the composition, has a particle size fraction of from 50 nm to 1 mm.
30 [0056] In certain embodiments, the subject polymer may have a
small amount of residual
acidic or basic functionality. In certain embodiments, the polymer has an acid
value of less
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than 10 mg KOH/g, such as less than 5 mg KOH/g, or less than 2.5 mg KOH/g. In
certain
embodiments, the polymer has an amine value of less than 10 mg KOH/g, such as
less than 5
mg KOH/g, or less than 2.5 mg KOH/g. These embodiments may occur, for example,
by
reaction to make the polymer not progressing to 100% completion, or by there
being a slight
molar difference between the amount of amines and acid functionalities.
[0057] Also provided are uses of the polymers described above as
dispersants in the
compositions described above.
[0058] Also provided are methods of dispersing a particulate solid in a
plastic material
using the subject polymer described above. For example, the polymer,
particulate solid and
plastic material may be mixed together in any order to form a composition as
described in the
various embodiments provided above. In certain embodiments, the ingredients
may be mixed
together such that the particulate solid is added to the mixture last.
[0059] Further provided are methods of using the polymers described
above as
dispersants in the compositions described above.
[0060] In certain embodiments, the polymers of any of the embodiments
described above
may be suitable for use as a processing aid or dispersant for particulate
solids, such as pigment
materials, incorporated into compositions, for example plastic materials, such
as thermoplastic
polymers.
[0061] In certain embodiments, the polymers described herein may be
present in such
compositions in an amount of 0.1 wt. % (such as 0.2, 0.3, 0.4, 0.5, 0.6, 0.7,
0.8, 0.9, 1, 1.5, 2,
2.5, 3, 3.5, 4, 4.5, 5, 6, 7, 8, 9, 10, 15, 20, or 25 wt. %) to 50 wt. % (such
as 45, 40, 35, or 30
wt. %), based on the total weight of the composition.
[0062] In certain embodiments, the particulate solid present in the
compositions may be
any inorganic or organic solid material. In certain embodiments, the
particulate solid may be
at least one of a pigment, an extender, a filler, a flame-retardant material,
a ceramic material, a
magnetic material, or metal particles. In certain embodiments, the particulate
solid is a pigment,
such as an inorganic pigment or an organic pigment.
[0063] In certain embodiments, the particulate solid may be an organic
pigment, such as
any of the recognized classes of pigments described in the Third Edition of
the Colour Index
(1971) and subsequent revisions of, and supplements thereto, under the chapter
entitled
"Pigmnets".
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[0064] Non-limiting examples of suitable organic pigments are at least
one pigment from
the azo, disazo, trisazo, condensed azo, azo lakes, naphthol,
anthrapyrimidine,
benzimidazolone, carbazole, diketopyrrolopyrrole, flavanthrone, indigoid,
isoindolinone,
isoindoline, isoviolanthrone, metal complex, oxazine, perylene, perinone,
pyranthrone,
pyrazoloquinazolone, quinophthalone, triarylcarbonium, triphendioxazine,
xanthene,
thioindigo, indanthrone, isoindanthrone, anthanthrone, anthraquinone,
isodibenzanthrone,
triphendioxazine, quinacridone, or phthalocyanine pigment series, and/or lakes
of acid,
basic and mordant dyes, and carbon black. In certain embodiments, the organic
pigment
is at least one of phthalocyanines, such as copper phthalocyanine and/or its
nuclear
halogenated derivatives, monoazos, disazos, indanthrones, anthranthrones,
quinacridones,
diketopyrrolopyrroles, perylenes, or carbon black.
[0065] In certain embodiments, the inorganic particulate solids may
include at least
one of: extenders and/or fillers, such as talc, kaolin, montmorillonites
including
bentonites, hectorites, saponites, mica, silica, barytes, chalk; flame-
retardant fillers, such
as alumina trihydrate, natural magnesium hydroxide, or brucite; particulate
ceramic
materials, such as alumina, silica, zirconia, titania, silicon nitride, boron
nitride, silicon
carbide, boron carbide, mixed silicon-aluminum nitrides, and/or metal
titanates;
particulate magnetic materials, such as the magnetic oxides of transition
metals, such as
iron and chromium (e.g., gamma-Fe2O3, Fe304, and cobalt-doped iron oxides),
calcium
oxide, ferrites, such as barium ferrites; and/or metal particles, such as
iron, nickel, cobalt,
copper and alloys thereof.
[0066] Non-limiting examples of suitable inorganic pigments include at
least one of
metallic oxides, such as titanium dioxide (e.g., rutile titanium dioxide
and/or surface-coated
titanium dioxide), titanium oxides of different colors (such as yellow and
black), iron oxides of
different colors (such as yellow, red, brown and black), zinc oxide, zirconium
oxide, aluminum
oxide, oxymetallic compounds (such as bismuth vanadate, cobalt aluminate,
cobalt stannate,
cobalt zincate, zinc chromate and mixed metal oxides of manganese, nickel,
titanium,
chromium, antimony, magnesium, cobalt, iron and aluminum), Prussian blue,
vermillion,
ultramarine, zinc phosphate, zinc sulphide, molybdates and chromates of
calcium and zinc,
metal-effect pigments (such as aluminum flake, copper, and copper/zinc alloy),
or pearlescent
flake (such as lead carbonate and bismuth oxychloride).
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[0067] In certain embodiments, thermoplastic polymers (such as
thermoplastic resins)
which may be included in the compositions described herein may include at
least one of
polyolefins, polyesters, polyamides, polycarbonates, polyurethanes,
polystyrenics,
poly(meth)acrylates, celluloses, or cellulose derivatives. These compositions
may be prepared
in a number of ways, such as by melt mixing or dry solid blending methods.
[0068] Non-limiting examples of a suitable thermoplastics include (low
density, linear
low density, or high density) polyethylene, polypropylene, polystyrene,
polyethylene
terephthalate (PET), polybutylene terephthalate (PBT), nylon 6, nylon 6-6,
nylon 6-12,
nylon 11, nylon 12, nylon 4-6, polymethylmethacrylate, polyethersulphone,
polysulphone,
polycarbonate, polyvinyl chloride (PVC), chlorinated polyvinyl chloride,
thermoplastic
polyurethane, ethylene vinyl acetate (EVA), Victrex PEEKTM polymers (such as
oxy-1, 4-
phenylenoeoxy-1, 4-phenylene-carbony1-1, and/or 4-phenylene polymers), and
acrylonitrile butadiene styrene polymers (ABS), and/or various other polymeric
blends or
alloys of the above materials and/or other thermoplastic polymers.
[0069] In certain embodiments, the compositions may contain from 1 to 95%
by weight
of the particulate solid, such as from 2% (e.g., 3%, 4%, 5%, 6%, 7%, 8%, 9%,
10%, 12%,
14%, 16%, 18%, 20%, 25%, 30%, 35%, 40%, or 45%) to 90% (e.g., 85%, 80%, 75%,
70%, 65%, 60%, 55%, or 50%) by weight, based on the total weight of the
composition.
For example, a composition in which the solid is an organic material, such as
an organic
pigment, may contain from 15 wt. % to 60 wt. % of the solid, based on the
total weight of
the composition, whereas a composition in which the solid is an inorganic
material, such
as an inorganic pigment, filler or extender, may contain from 40 wt. % to 90
wt. % of the
solid, based on the total weight of the composition.
[0070] The compositions described herein may include one or more other
ingredients
such as at least one of antifogging agents, nucleators, blowing agents, flame
retardants,
process aids, surfactants, heat stabilizers, UV absorbers, fragrances, anti-
microbial agents,
biocides, impact modifiers, antioxidants, antistatic agents, coupling agents,
foaming
agents, mold-release agents, lubricants (external and internal), plasticizers,
slip agents,
UV stabilizers, viscosity depressants, dispersants other than the polymers of
the present
subject matter, and air-release agents.
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[0071] The thermoplastic polymer/resin compositions described herein
may be prepared
by any methods known for preparing thermoplastic compositions. Thus, for
example, a
solid, thermoplastic polymer, and a dispersant may be mixed in any order, the
mixture
then being subjected to a mechanical treatment to reduce the particles of the
solid to an
appropriate size, for example, by Banbury mixing, ribbon blending, twin-screw
extrusion,
twin-roll milling, compounding in a Buss co-kneader, or similar equipment.
[0072] In certain embodiments, the compositions described herein may
comprise (a)
0.1 to 50 wt. %, or 0.25 to 35 wt. %, and 0.5 to 30 wt. % of the polymer
described above;
(b) up to 90 wt. % (such as greater than 0 to 90 wt. %, or 0.1 wt. % to 90 wt.
%, or 1 wt.
% to 90 wt. %) of an amorphous poly-a-olefin, such as a polyethylene/
polypropylene
mixture; (c) up to 90 wt. % (such as greater than 0 to 90 wt. %, or 0.1 wt. %
to 90 wt. %,
or 1 wt. % to 90 wt. %) of a wax, such as a polyolefin wax, for example a
polyethylene
wax; (d) up to 30 wt. % (such as greater than 0 to 30 wt. %, or 0.1 wt. % to
30 wt. %, or
1 wt. % to 30 wt. %) of a crystalline polyolefin; and (e) up to 75 wt. % (such
as greater
than 0 to 75 wt. %, or 0.1 wt. % to 75 wt. %, or 1 wt. % to 75 wt. %) of a
hydrogenated
castor oil wax. In certain embodiments, at least one of (b) or (c) is present
in an amount
of at least 0.1 wt. %.
[0073] It is noted that certain embodiments described herein could
theoretically be
interpreted to include a total wt. % of all components of the compositions
described herein
which is greater than 100 wt. %, based on the total weight of any particular
composition.
Persons of ordinary skill in the relevant art would understand that it is
impossible for a
composition to include greater than 100 wt. % of all components of the
composition, and as
such any embodiments which may be perceived to include greater than 100 wt. %
of all
components are specifically excluded from the subject matter described herein.
For example,
.. if the composition may include (among other possible components) an
amorphous poly-a-olefin
present in an amount of up to 90 wt. %, a wax present in an amount of up to 90
wt. %, based
on the total weight of the composition, the amount of each component would be
selected such
that the total wt. % of all components of the composition does not exceed 100
wt. % of the
composition.
[0074] The polyolefin wax (such as a polyethylene wax) may be a carrier, co-
agent or
synergist.
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[0075] In certain embodiments, provided are micronized compositions.
In one
embodiment, the compositions comprising at least one of (i) an amorphous poly-
a-olefin,
or (ii) a polyolefin wax, have a particle size fraction of at least 10 wt %
having a diameter
of 1 mm or less, or 0.5 mm or less, or 0.1 mm or less, or 0.05 mm or less. In
certain
embodiments, the particle size fraction may be 50 nm to 1 mm, or 100 nm to
0.05 mm.
[0076] A suitable use of the polymers described herein may be in the
production of
dispersible solids in powder particle and/or fiber particle form, particularly
of dispersible
pigments or polymeric fillers, where the particles are coated with the
dispersant. Coatings
of this kind, of both organic and inorganic solids, are carried out in a known
way, for
example as described in EP-A-0 270 126. In this case a solvent or emulsion
medium may
either be removed or remain in the mixture, forming pastes. These pastes are
customary
commercial products and may further comprise binder fractions and also further
auxiliaries and additives. In the case of pigments it is possible to coat the
pigment surface
during or after the synthesis of the pigments, by, for example, adding the
polymers
described herein to a pigment suspension, or during or after the operation of
pigment
finish. Pigments pretreated in this way are notable for greater ease of
incorporation and
also for enhanced viscosity, flocculation and gloss performance and for higher
colour
strength, as compared with untreated pigments.
[0077] Other suitable uses of the polymers described herein include
dispersants for
paints, inks, and coatings, or in any other products in which the polymers may
be suitably
used as dispersants.
[0078] The compositions described herein may be treated as a "master
batch", and added
to additional polymeric material when forming fabricated articles. The amount
of "master
batch" which is mixed with the additional polymeric material may vary over
wide limits
depending on the nature of polymeric material and the particulate solid. In
different
embodiments, the amount of "master batch" may be 0.5 to 50%, or 10 to 50%, or
20 to 50%,
based on the total weight of the final plastic article. Although the plastic
material used in
preparing the "master batch" may differ from the further plastic material to
which the "master
batch" is added, but may be the same, depending on the desired final material.
The use of
"master batches" is especially useful where the plastic material includes
polypropylene,
polyethylene, polyethylene/polypropylene diene, ethyl vinyl acetate,
polychloroprene,
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chlorinated polyethylene, chlorosulphonated polyethylene, poly vinyl chloride,
natural and
synthetic rubber such as butadiene-based elastomers (for instance butadiene-
styrene, butadiene-
acrylonitrile rubbers, polybutadiene), polyisoprene or natural rubber.
[0079] EXAMPLES
[0080] The subject matter disclosed herein may be better understood with
reference to the
following examples, which are set forth merely to further illustrate the
subject matter disclose
herein. The illustrative examples should not be construed as limiting the
subject matter in any
manner.
[0081] Comparative Example 1 ("CE1"): Behenic acid (178.94 g) and
hexamethylene
diamine (30.53 g) (preheated to 50 C) are charged to a 500 ml 3 neck round
bottom flask
and the contents are heated to 140 C with overhead stirring and a nitrogen
atmosphere.
Zirconium IV butoxide (-80% in tert-butanol) (0.6 g) is added and the reaction
temperature is increased to 180 C and held for 5 hours. A hard off-white
solid (180 g) is
obtained. IR analysis indicates amide peaks at 1644 cm-1, 1634cm-1 and an
amide N-H
stretch at 3312 cm-1. Comparative Example 1 is Example 9 from US 2011/0041730
Al,
and all information regarding this example is incorporated by reference
herein.
[0082] Example 1 ("EX1"): 77.33 parts of a dimer fatty acid (Unidymeg
18 from Kraton),
20.55 parts hexamethylenediamine and 25.28 parts stearic acid were charged to
a reaction
vessel under nitrogen and heated to 120 C for 15 minutes. Then 0.64 parts
zirconium butoxide
solution (80% butanol) were charged and the reaction temperature was increased
to 180 C for
180 hours. Then the reaction was stopped and material poured off and cooled to
yield a yellow
solid which was ground in a coffee grinder and sieved through a 1.7 mm sieve
to yield a yellow
powder.
[0083] Example 2 ("EX2"): 70.13 parts of a dimer fatty acid (Unidymeg
18 from Kraton),
20.92 parts hexamethylenediamine and 34.14 parts stearic acid were charged to
a reaction
vessel under nitrogen and heated to 60 C for 15 minutes. Then 0.37 parts
zirconium butoxide
solution (80% butanol) were charged and the reaction temperature was increased
to 180 C for
180 hours. Then the reaction was stopped and material poured off and cooled to
yield a yellow
solid which was ground in a coffee grinder and sieved through a 1.7 mm sieve
to yield a yellow
powder.
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[0084] Example 3 ("EX3"): 82.54 parts of a dimer fatty acid (Unidymeg
18 from Kraton),
20.62 parts hexamethylenediamine and 20.53 parts stearic acid were charged to
a reaction
vessel under nitrogen and heated to 60 C for 15 minutes. Then 0.35 parts
zirconium butoxide
solution (80% butanol) were charged and the reaction temperature was increased
to 180 C for
180 hours. Then the reaction was stopped and material poured off and cooled to
yield a yellow
solid which was ground in a coffee grinder and sieved through a 1.7 mm sieve
to yield a yellow
powder.
[0085] Example 4 ("EX4"): 69.49 parts of a dimer fatty acid (Unidymeg
14 from Kraton),
10.84 parts Ethyl enediamineand 34.67 parts stearic acid were charged to a
reaction vessel
under nitrogen and heated to 60 C for 15 minutes. Then 0.36 parts zirconium
butoxide solution
(80% butanol) were charged and the reaction temperature was increased to 180
C for 180
hours. Then the reaction was stopped and material poured off and cooled to
yield a yellow solid
which was ground in a coffee grinder and sieved through a 1.7 mm sieve to
yield a yellow
powder.
[0086] Testing
[0087] 7.5 parts of each example above were mixed with 30 parts of blue
pigment (Heliogen
Blue K6911 from BASF) and 62.5 parts nylon 6 (Akulon k222-D from DSM) on a WAB
tubular
mixer to prepare samples for extrusion. These samples were then extruded in a
16 mm twin
screw extruder at a screw speed of 100 rpm and a feed rate of 12% (8% for EX4
and EX5) with
the following temperature profile: 170 C in zone 1 (feed), 230 C in zone 2,
240 C in zone 3,
240 C in zone 4 and 240 C in zone 5 (die); to produce a master batch. Each
master batch was
then let down into nylon 6 (Akulon k222-D from DSM) and titanium dioxide white
pigment
(Tioxideg R-FC5 from Huntsman) to give a final composition of 0.5 % blue
pigment and 5%
white pigment in nylon 6, which was done on a Betol single screw extruder and
then injection
molded using BOY15S to produce color chips. Each color chip's color strength
was then
measured on a data color spectrophotometer (reflectance) against a color chip
that had been
prepared with no additives that was set to 100%, and the results are provided
in Table 1, below.
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Table 1
Sample Col or Strength
CE1 148.6
EX1 197.5
EX2 158.0
EX3 141.5
EX4 123.4
[0088] As described above, Comparative Example 1 is non-polymeric in
nature, whereas
Examples 1 through 4 are polymeric in nature, including the subject polymer as
a dispersant in
the described compositions. While Examples 1 and 2 show a definitive
improvement over
Comparative Example 1 in color strength, Examples 3 and 4 may be considered to
be about the
same or slightly worse than Comparative Example 1. However, one objective of
the subject
matter described herein is to provide a polymer/composition which may have
fewer regulatory
hurdles to overcome, and that may be achieved at least in part by providing a
polymeric
dispersant, which would face fewer regulatory hurdles than a non-polymeric
dispersant. Fewer
regulatory hurdles means that a substance will be able to be brought to market
more quickly
and at lower cost.
[0089] Except in the Examples, or where otherwise explicitly indicated
or required by
context, all numerical quantities in this description specifying amounts of
materials, reaction
conditions, molecular weights, number of carbon atoms, and the like, are to be
understood as
modified by the word "about". It is to be understood that the upper and lower
amount, range,
and ratio limits set forth herein may be independently combined, and that any
amount within a
disclosed range is contemplated to provide a minimum or maximum of a narrower
range in
alternative embodiments (with the proviso, of course, that the minimum amount
of a range must
be lower than the maximum amount of the same range). Similarly, the ranges and
amounts for
each element of the subject matter disclosed herein may be used together with
ranges or
amounts for any of the other elements.
[0090] While certain representative embodiments and details have been
shown for the
purpose of illustrating the subject matter disclosed herein, it will be
apparent to those skilled in
this art that various changes and modifications may be made therein without
departing from the
scope of the subject matter. In this regard, the scope of the invention is to
be limited only by
the following claims.
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